Sewing-machine.



UNITED sfiwrns manna onirica.

ALBERT H. DE VOE, OF WESTFIELD, NEW JBSEY, ASSIGNOE T0 THE SINGER MANU- FACTURING COMPANY, A CORPORATION OF NEW JERSEY.

SEWING-MACHINE.

Original application filed July 22, 1914, Serial Ni). 852,345.A Divided and this application filed April l, I

Specification of Letters Patent.

Patented Jan. 1, 1912..

1916. Serial N0. 88,206.

To all 'whom t may concern:

Be it known that l, ALBERT H. DE V0E, a citizen of the United States, residing at Westfield, in the county ofUnion and State .t

' tion, Serial No. 852,345, filed July 22, 1914,

of which the present application is a d1- vision.

In the preferred embodiment of the invention, the improved mechanism is carried by a frame comprising a. hollow standard from the upper end of which extends a lateral arm comprising an arched tubular intermediate member, connected at its free-end with the upper side of a lateral work-supporting member', having a free space around the opposite` sides, the bottom and both ends. The work-supporting member is disposed transversely to both the standard, from which it is laterally offset, and the i11- termediate member. A main-shaft extends Within and lengthwise of the intermediate member of the frame and is connected with suitable driving means within the standard.

The needle is carried at one end of a vibratory lever-arm pivoted between its ends to the frame and having a connection with a driving element on the main-shaft. The feed-dog is provided with an elongated, laterally extending, hollow, cylindrical shank, slidingly received in a horizontally disposed, rocking, tubular support having an arm connected by a link with the needle-lever. A flexible rod secured to the feed-dog within the hollow shank thereof, is connected to suitable mechanism and actuated thereby to impart feedand return-movements to the feed-dog. The needle-lever actuating means acts through the link above mentioned to rock the tubular support and impart rising and falling movements to the feed-dog. Thus a single element driven by the `mainshaft is utilized to impart properly timed reciprocatory movements to the needle and rising and falling movements to the feeddog.

Inl the accompanying drawings which form a part of this specification, Figures 1' and 2 are perspective Views of the preferred embodiment of the invention as used in the machlne disclosed in my said co-pending application Fig. 3 is a perspective view of the improved needle and feed-actuating mechanism detached fromthe frame.

sustaining at its upper end the lateral arm comprising the arched tubular member 3 having the usual feed-dog and needleaper tures. The intermediate frame member Ais provided at its outer end with an enlarge# ment 3 affording a cavity which merges into a cavity 4 below the same at the adjacent end of the work-supporting member. ,l ,l

Extending through the intermedia-te frame member 3 and journaled in suitable bearings is the main-shaft 6 to which -is secured with# in the standard 1 the toothed pinion 7,. mesh? ing with the gear-wheel 8 which is mounted upon the shortshaft 9 journaled within and transversely of the standard 1 and having the attached grooved belt-wheel 1() embraced by the driving belt 11. ,n n

Mounted upon the transverse fulcrum-pin 12, sustained in the frame member 4 adjacent the member 3, is the hub 13 of the vibratory needle-supportingand -actuating lever 14 which is provided at its outer end with the apertured boss 15 in which is se-` cured the shank of the needle-clamp 16 provided with the reciprocating needles 17 cooperating with the loop-taking elementsv 18 As represented o'in the drawings, the vsup-v. porting frame comprises the hollow upright Z standard 1 having the iianged base 2 and a cylindrical shank Z4 which is iitted within the tubular' arm 25 of a reed-dog supporting and actuating element in the form ot a rocklever having the transversely apertured lug 26 and the rearwardly extending arm 27, said rock-lever Working in a central channel 4* arranged in the upper portion of the work-'supporting member 4. The apertured lug 26 of the rock-lever is entered by and supported upon the transverse fulcrum-pin 28 mounted in the y-meniber 4 intermediate its ends. The rock-lever arm 27 carries at its rearward extremity the screw-stud 29 which is embraced by the` apertured boss 3() at the lower end of a link 8l whose apertured opposite end embraces a stud-screw 32 tap ed into the aperturedboss of the needleever hub 13. Rocking movements are thus imparted to the lever-arm Z7 from the vibratory needle-lever for communicating to the feed-dog its rising and falling movements-` The shank 24 of the 'feed-dog is of tubular form terminating at the end adjacent the same in a socket in which is rigidly secured by means of the Set-screw 33 one end of a 'thin resilient rod 84 whose opposite end is secured by means of screws 35 in a socket formed in the head 36 of a rocking pin 37. The pin 37 is journaled wit-hin a. transverse boss 38 formed at the end of a depending arm of a rocking frame constituting the feed-rocker and formed .with the sleeves 40 and 4l journaled upon the main-shaft G and connected together by means of the yoke bridging the intermesliing gears 43 and 44.

'The sleeve 41 ot the rocking trame has secured upon its extremity the split hub 45 of an upwardly extending arm 46 carrying a stud 47 which is embraced by one aper` tured extremity of the link 48 whose forked and apertured opposite extremity is pivotally connected by means of the pin 49 with the upper end or a vibratory bar 50 adjustably secured near its lower end by means of the set-screw 51 within the apertured head 52 of a rocking ulcrum-pn 53 journaled within and transversely of the standard l.

The bar 50 is slidingly itted near its upper end within the transverse boss 54 of a strap or sleeve 55 embracing the feed eccentric 56 which is mounted for lateral adjustment upon the slide-plate 57 of the collar 58 fixed upon the main-shaft, the adjustable feed eccentric being or' well-known form.

By loosening the set-screw 5l, the bar 50 may be adjusted vertically relatively to its fulcrum-pin 53 and the position of the conmeeting link 48 may be changed to correspondingly vary the connection between the arm 45 ot the feed-rocker and the actuating eccentric 56. As will be observed, the feedroclrer communicates its operative movements to the feed-dog through the arm and .rod in the production of the workadvancing movements, the slight bending of 'the rod 34 intermediate its ends being permitted by reason of the clearness therefor aii'orded for the tubular form of the feed! dog shank 24.

Alflaving thus set forth the nature of the invention., what claim herein is z,-

l. ln a sewing machine, in combination, a main-shaft, a needle, a needle-supporting and actuating element, a feed-dog, a feeddog supporting land actuating element, a sing-le link directly connecting said elements, and a driving connection between said mainshaft and one of said elements.

2. ln a sewing machine'.y in combination, a main-shaft, a needle, a `neeelle-actuating lever, a feed-dog, a feed-dog actuating lever, a single link directly connecting said levers, and a driving connection between said mainsbaft and one ot' said levers.

3. ln a sewing machine, in combination, a main-shaft, a needle, a needle-actuating lever carrying said needle, a iced-doof, a feed-dog actuating lever carrying said eeddog, a link pivoted at its opposite ends to said levers anda driving connection between said main-shaft and one of said levers.

4. ln a sewing machine, inv combination, a trame, a main-shaft, a needle, a needle-carrying lever, a feed-dog, a feed-dog carrying lever, said levers being pivoted between their lends to said iframe, a link pivotally con- -uected at its; opposite ends to said levers at the same side of their liulcrums and an operative connection between said main-shaft and one of said levers.

5. ln a sewing machine, in combination, a main-shaft, a needle-lever, a needle sustained thereby, a feed-lever, a feed-dog'sustained thereby, said levers being fulcrumed to vibrate in substantially parallel planes, a link connected at its opposite ends to said levers at the same side oii their respective fulcrums, and a driving connection between said mainshaftand one of said levers.

6. ln a sewing machine, in combination, a frame including a hollow work-supporting arm, stitcl'i-forming mechanism incorporated.

in said frame and including a needle and a. vibratory arm sustaining the same, and feeding lmechanisifn including a Jfeed-dog, a rocking member upon and relative to which said feed-dog is slidably mounted for endwise reciprocatory movement, a connection intermediate said vibratory arm and said rocking member for imparting to the feed-dog its rou rising and falling movements, and means for reciprocating said feed-dog.

7. ln a sewing machine, the combination with a shaft provided with a feed-actuating element, of feeding mechanism comprising a feed-rocker provided with a crank-arm, a feed-dog operatively connected therewith, an endwise adjustable vibratory bar slidably connected with said actuating element,

and a, pivotal connection between said bar and crank-arm.

8. In a sewing machine, the combination with a shaft provided with a feed-actuating element, of feeding mechanism com rising a feed-rocker provided with a cran -arm, a feed-dog operatively connected therewith, an endwise adjustable vibratory bar slidably connected with said actuating element, a fixed fulcrum for said bar, and an operative connection adjustable toward and from said actuating element between said bar and crank-arm, said last mentioned connection being fixed relatively to the length of said vibratory bar. y

9. In a sewing machine, the combination with a shaft provided with a feed-actuating element, of feeding mechanism comprising a feed-rocker journaled 4upon said shaft and provided with a crank-arm, a feed-dog operatively connected therewith, a vibratory bar operatively connected with said actuating element, and a connection' between said bar and crank-arm.

10. In a sewing machine, the combination with stitch-forming mechanism including a needle and a vibratory arm sustaining the same, of feeding mechanism including a feed-dog, a rockin member upon which said feed-dog is sliding y mounted, a feed-rocker,`

11. In a sewing machine, the combination with a shaft provided with a feed-actnating element, of feeding mechanism comprising a feed-rocker provided with a crank-arm, a feed-dog operatively connected therewith, a

vibratory bar operatively connected withv nection betweensaid bar and said crankfA arm.

13. In a wing machine, the combination with a shaft provided with a feed-actuating eccentric, of feeding mechanism comprising a feed-rocker provided with a crank-arm, a. feed-dog operatively connected therewith, a vibratory bar, a fnlcrum therefor-7 a strap embracing said eccentric and provided with a socket embracing said bar, a link connection between said bar andsaid crank-arm,

and means whereby said bar may be adjusted lengthwise upon its fnlcrum to vary the position of said link connection relatively to the actuating eccentric. In testimony whereof I have signed my name to this specification.

ALBERT I-I. DE VE. 

